Terminate the integration test process if cleanup fails

src/VisualStudio/IntegrationTest/TestUtilities/InProcess/VisualStudioWorkspace_InProc.cs

@@ -133,6 +133,18 @@ public void WaitForAllAsyncOperations(TimeSpan timeout, params string[] featureN
             GetWaitingService().WaitForAllAsyncOperations(timeout, featureNames);
         }
 
+        public void WaitForAllAsyncOperationsOrFail(TimeSpan timeout, params string[] featureNames)
+        {
+            try
+            {
+                WaitForAllAsyncOperations(timeout, featureNames);
+            }
+            catch (Exception e)
+            {
+                Environment.FailFast("Terminating test process due to unrecoverable timeout.", e);
+            }
+        }
+
         private static void WaitForProjectSystem(TimeSpan timeout)
         {
             var operationProgressStatus = InvokeOnUIThread(_ => GetGlobalService<SVsOperationProgress, IVsOperationProgressStatusService>());

src/VisualStudio/IntegrationTest/TestUtilities/OutOfProcess/VisualStudioWorkspace_OutOfProc.cs

@@ -48,6 +48,9 @@ public void WaitForAsyncOperations(TimeSpan timeout, string featuresToWaitFor, b
         public void WaitForAllAsyncOperations(TimeSpan timeout, params string[] featureNames)
             => _inProc.WaitForAllAsyncOperations(timeout, featureNames);
 
+        public void WaitForAllAsyncOperationsOrFail(TimeSpan timeout, params string[] featureNames)
+            => _inProc.WaitForAllAsyncOperationsOrFail(timeout, featureNames);
+
         public void CleanUpWorkspace()
             => _inProc.CleanUpWorkspace();
 

src/VisualStudio/IntegrationTest/TestUtilities/VisualStudioInstance.cs

@@ -216,7 +216,7 @@ public void CleanUp()
             Workspace.CleanUpWaitingService();
             Workspace.CleanUpWorkspace();
             SolutionExplorer.CleanUpOpenSolution();
-            Workspace.WaitForAllAsyncOperations(Helper.HangMitigatingTimeout);
+            Workspace.WaitForAllAsyncOperationsOrFail(Helper.HangMitigatingTimeout);
 
             // Close any windows leftover from previous (failed) tests
             InteractiveWindow.CloseInteractiveWindow();